* @brief Implements a trace scheduler as presented in Muchnik[TM].
* @author Michael Beck
* @date 28.08.2006
- * @version $Id$
*/
#include "config.h"
*/
static ir_node *get_nodeset_node(const ir_nodeset_t *nodeset)
{
- ir_nodeset_iterator_t iter;
-
- ir_nodeset_iterator_init(&iter, nodeset);
- return ir_nodeset_iterator_next(&iter);
+ return ir_nodeset_first(nodeset);
}
/**
static int get_num_successors(ir_node *irn)
{
int sum = 0;
- const ir_edge_t *edge;
if (get_irn_mode(irn) == mode_T) {
/* for mode_T nodes: count the users of all Projs */
if (get_irn_mode(irn) == mode_T) {
/* mode_T nodes: num out regs == num Projs with mode datab */
- const ir_edge_t *edge;
foreach_out_edge(irn, edge) {
ir_node *proj = get_edge_src_irn(edge);
if (mode_is_datab(get_irn_mode(proj)))
*/
static int is_root(ir_node *root, ir_node *block)
{
- const ir_edge_t *edge;
-
foreach_out_edge(root, edge) {
ir_node *succ = get_edge_src_irn(edge);
ir_node *root = NULL, *preord = NULL;
ir_node *curr, *irn;
int cur_pos;
- const ir_edge_t *edge;
/* First step: Find the root set. */
foreach_out_edge(block, edge) {
env->curr_time = 0;
env->sched_info = NEW_ARR_F(trace_irn_t, nn);
- env->liveness = be_liveness(irg);
+ env->liveness = be_get_irg_liveness(irg);
FIRM_DBG_REGISTER(env->dbg, "firm.be.sched.trace");
- be_liveness_assure_chk(env->liveness);
+ be_assure_live_chk(irg);
memset(env->sched_info, 0, nn * sizeof(*(env->sched_info)));
return env;
static void trace_free(void *data)
{
trace_env_t *env = (trace_env_t*)data;
- be_liveness_free(env->liveness);
DEL_ARR_F(env->sched_info);
free(env);
}
*/
static ir_node *basic_selection(ir_nodeset_t *ready_set)
{
- ir_node *irn = NULL;
- ir_nodeset_iterator_t iter;
-
/* assure that branches and constants are executed last */
foreach_ir_nodeset(ready_set, irn, iter) {
if (!is_cfop(irn)) {
}
/* at last: schedule branches */
- irn = get_nodeset_node(ready_set);
-
- return irn;
+ return get_nodeset_node(ready_set);
}
/**
* The muchnik selector.
*/
-static ir_node *muchnik_select(void *block_env, ir_nodeset_t *ready_set, ir_nodeset_t *live_set)
+static ir_node *muchnik_select(void *block_env, ir_nodeset_t *ready_set)
{
trace_env_t *env = (trace_env_t*)block_env;
ir_nodeset_t mcands, ecands;
- ir_nodeset_iterator_t iter;
sched_timestep_t max_delay = 0;
- ir_node *irn;
- (void) live_set;
/* calculate the max delay of all candidates */
foreach_ir_nodeset(ready_set, irn, iter) {
}
/* select a node */
+ ir_node *irn;
if (ir_nodeset_size(&mcands) == 1) {
irn = get_nodeset_node(&mcands);
DB((env->dbg, LEVEL_3, "\tirn = %+F, mcand = 1, max_delay = %u\n", irn, max_delay));
/**
* Execute the heuristic function.
*/
-static ir_node *heuristic_select(void *block_env, ir_nodeset_t *ns, ir_nodeset_t *lv)
+static ir_node *heuristic_select(void *block_env, ir_nodeset_t *ns)
{
trace_env_t *trace_env = (trace_env_t*)block_env;
- ir_node *irn, *cand = NULL;
+ ir_node *cand = NULL;
int max_prio = INT_MIN;
int cur_prio = INT_MIN;
- int cur_pressure = ir_nodeset_size(lv);
- int reg_fact, cand_reg_fact;
- ir_nodeset_iterator_t iter;
+ int reg_fact;
+ /* Note: register pressure calculation needs an overhaul, you need correct
+ * tracking for each register class indidually and weight by each class
+ int cur_pressure = ir_nodeset_size(lv); */
+ int cur_pressure = 1;
/* prefer instructions which can be scheduled early */
#define PRIO_TIME 3
int sign = rdiff < 0;
int chg = (rdiff < 0 ? -rdiff : rdiff) << PRIO_CHG_PRESS;
- /* reg_fact = chg << cur_pressure; */
reg_fact = chg * cur_pressure;
if (reg_fact < chg)
reg_fact = INT_MAX - 2;
if (cur_prio > max_prio) {
cand = irn;
max_prio = cur_prio;
- cand_reg_fact = reg_fact;
}
DBG((trace_env->dbg, LEVEL_4, "checked NODE %+F\n", irn));
be_list_sched_graph(irg, &heuristic_selector);
}
-BE_REGISTER_MODULE_CONSTRUCTOR(be_init_sched_trace);
+BE_REGISTER_MODULE_CONSTRUCTOR(be_init_sched_trace)
void be_init_sched_trace(void)
{
be_register_scheduler("heur", sched_heuristic);